Environmental risk increase due to heavy metal contamination caused by a copper mining activity in Southern Brazil

Citation
Ed. Bidone et al., Environmental risk increase due to heavy metal contamination caused by a copper mining activity in Southern Brazil, AN AC BRASI, 73(2), 2001, pp. 277-286
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
ISSN journal
0001-3765 → ACNP
Volume
73
Issue
2
Year of publication
2001
Pages
277 - 286
Database
ISI
SICI code
0001-3765(200106)73:2<277:ERIDTH>2.0.ZU;2-8
Abstract
The Camaqua Copper Mines (CCM) were the main sulphide deposit in Southern B razil and have been in operation from last century to 1996. To evaluate wat er contamination and environmental risk increase by heavy metals from minin g operations, two points on the Joao Dias Creek were sampled Station 1, bac kground area and Station 2, contaminated anal. Mining activity increased th e natural weakly heavy metal fluxes by approximately 5424 kg. (similar to 6 0%) of the total metal flux, 1542 kg. (similar to 49%) of dissolved and 388 1 kg (similar to 66%) of particulate metal flux. Total metal flux of anthro pic origin was mostly due to Fe followed by Cu > Zn > Mn whereas Cd, As and Pb fluxes were negligible. The potential human health hazards and risk ass essment related to daily intake of water from Joao Dias Creek are mostly du e to Mn and should be of concern for the contaminated area. The ingestion o f water from station 2 represents incremental risks of 130% and 59% respect ively, considering the non-carcinogenic and the carcinogenic effects. The r eal increase of human health hazards may be greater than those related to t he total concentrations since Mn and As dissolved concentrations were 5.5 a nd 2.0 higher than acceptable, respectively.